Why not? Because her 25-year-old son is serving 70 years as a three-strikes offender despite committing what she called nonviolent crimes that stemmed from his addiction.
Why, asked Bergman, must we treat nonviolent drug use as a crime rather than a health issue? Why do we spend billions trying to cut off the supply despite no evidence that such a thing is possible? And why are we wasting precious resources going after marijuana that could be better spent on drug education and treatment?
The moms said their children had made bad choices, fueled in some cases by mental health issues. But once you've been kicked out of school or arrested, it's hard to rebuild your life.
"There's so much money in the prison system and criminal justice system," Bergman said. "They're so well-organized to scoop people into their big nets. But healthcare is so disjointed and parents and families have to mortgage their homes" to pay for drug treatment.
In Mexico last year, the poet Sicilia made a declaration after his son's murder. Loosely translated, he said:
"We've had it."
Sicilia said his son, 24, was asked by five friends to go with them to a bar to retrieve some items stolen from their car.
The bar was run by narco-traffickers, said Sicilia, and his son and five friends were murdered.
"My son was an extraordinary person," Sicilia said Friday in an email to me, "hard-working, brimming with a sense of humor and in love with life."
Sicilia has led a call for policy changes on both sides of the border, arguing that economic and human investment in Mexico makes more sense than continued militarized attacks on cartels. As for the trip across the U.S., Sicilia said, "the goal is to provoke the conscience of American society as to the role it has in this war and the necessity that we work together for peace."
On Monday, the caravan will be on Olvera Street in downtown Los Angeles from 11 a.m. to 7 p.m. Sicilia is scheduled to be there, a cross-border messenger representing a lost son and letting out a cry for the San Diego moms and all the others, too.
"We've had it."